The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 宇宙伽马暴、中子星及相关物理研究团组

	The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum
	Liu, QZ ; Hu, JY ; Hang, HR ; Qiu, YL ; Zhu, ZX; Qiao, QY
刊名	ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
	2000-06-01
卷号	144 期号:2 页码:219-225
关键词	supernovae : general supernovae : individual (SN 1998S)
ISSN号	0365-0138
英文摘要	We present the BVR photometry and the spectra of SN 1998S taken about four months after discovery, beginning a week and 6 days before maximum brightness respectively. The light curves show a steep and linear dt:cline. which are consistent with those of SN 1979C and are typical of a SN II-L. An absolute magnitude at maximum M-B(O) less than or equal to -18.7 is derived, which is more than 2 mag brighter than the regular SNII and indicates this SN is a member of the rare class of Bright SNII. The B - V color evolution at early epoch is also typical of linear SN II with a maximum (B - V) value of +1.35, similar to the typical Ts pe II-L SN 1980K. The spectral evolution is typical for SN II-L, very similar to that of the SN 1979C. They, however, showed some differences. The spectrum before maximum showed high-ionization N III and He II emission lines superposed on a strong blue continuum. Around the maximum light the high-ionizatisn emission lines disappeared, leaving weak H I. He I emission lines, which are similar to those of SN 1983K. The extraordinary feature on the post-maximum spectra is the narrow emission P Cygni profile superposed on a much broader P Cygni structure in all five Balmer lines, Ha to HE. Such feature is reminiscent of the post-maximum spectra of SN 1984E. Rapid spectral and photometric evolution, together with the presence of obvious P Cygni profile, suggests that SN 1998S is more consistent with the nature of a type II-L, supernova than that of a IIn supernova, although narrow lines are present on the premaximum spectrum.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	II SUPERNOVAE ; OPTICAL-SPECTRA ; LIGHT CURVES ; NOVA 1979C
收录类别	SCI
语种	英语
WOS记录号	WOS:000088229400005
公开日期	2013-02-01
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8283]
专题	紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100864, Peoples R China 3.Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands 4.Chinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Liu, QZ,Hu, JY,Hang, HR,et al. The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,2000,144(2):219-225.
APA	Liu, QZ,Hu, JY,Hang, HR,Qiu, YL,Zhu, ZX,&Qiao, QY.(2000).The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,144(2),219-225.
MLA	Liu, QZ,et al."The supernova 1998S in NGC 3877: Another supernova with Wolf-Rayet star features in pre-maximum spectrum".ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES 144.2(2000):219-225.